Definition of auxiliary adjective from the Oxford Advanced Learner's Dictionary

auxiliary

adjective

/ɔːɡˈzɪliəri/

(of workers) giving help or support to the main group of workers synonym ancillary
- auxiliary nurses/workers/services
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(specialist) (of a piece of equipment) used if there is a problem with the main piece of equipment
- an auxiliary pump

Word Originlate Middle English: from Latin auxiliarius, from auxilium ‘help’.

See auxiliary in the Oxford Advanced American DictionarySee auxiliary in the Oxford Learner's Dictionary of Academic English

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